Drilling tool guide wire alignment device

• US 7,422,594 B2
• Filed: 06/17/2004
• Issued: 09/09/2008
• Est. Priority Date: 06/20/2003
• Status: Active Grant

• Current Assignee: Stryker European Operations Holdings, LLC (Stryker Corporation)
• Original Assignee: Stryker Trauma GmbH (Stryker Corporation)
• Inventors: Zander, Nils
• Primary Examiner(s): Robert; Eduardo C.
• Assistant Examiner(s): SWIGER III, JAMES L
• Application Number:
  US10/870,299
• Publication Number:
  US 20040260307A1
• Time in Patent Office: 1,545 Days
• Field of Search: 606/80, 606/86, 606/104, 606/96, 606/103, 604/164.11, 604/164.12, 604/164.13, 604/165.01, 604/506, 604/69
• US Class Current: 606/80
• CPC Class Codes: A61B 17/1697 specially adapted for wire insertion
• CPC Class Codes: A61B 17/17 Guides or aligning means for drills , mills, pins or wires
• CPC Class Codes: A61B 17/1717 for applying intramedullary nails or pins
• CPC Class Codes: A61B 2090/08021 of the patient or his organs

Abstract

A device for installation of a guide wire for a drilling tool in a correct positional arrangement in a bone. The device includes a tissue protection sleeve, which has at one end a laterally projecting grip or handle. A trocar is provided, which trocar can be introduced into the tissue protection sleeve from the handle end and whose other end is closed. The trocar is rotatable in the tissue protection sleeve and has a central bore hole and a plurality of eccentric axially parallel bore holes, through which a guide wire can be passed. A second handle is provided which extends approximately in the same direction of the first handle and whose one end engages the end of the trocar situated the outside of the tissue protection sleeve, so that the normally freely rotatable trocar is fixed in the direction of rotation relative to the tissue protection sleeve, when both handles are manually clamped against each other.

Claims

1. A device for installation of a guide wire for a drilling tool in a correct positional arrangement in a bone comprising:

a tissue protection sleeve having a longitudinal axis, which has at one end a handle projecting laterally with respect to the sleeve longitudinal axis and a trocar having a longitudinal axis, said trocar for introduction into the tissue protection sleeve from the handle end for rotatable movement within said sleeve, whereby the trocar is rotatable in the tissue protection sleeve and has a central bore hole and a plurality of axially parallel bore holes surrounding said central bore, through which holes, a guide wire can be passed, said trocar having a handle unconnected to the sleeve handle extending laterally to the trocar longitudinal axis which can be oriented by rotation about the sleeve longitudinal axis in an approximately parallel direction to the sleeve handle, said trocar handle having one end which engages an end of the trocar situated outside of the tissue protection sleeve, so that the normally freely rotatable trocar is fixed in the direction of rotation relative to the tissue protection sleeve when both handles are manually clamped against each other by deflecting at least one of the handles the trocar having a shaft extending along the longitudinal axis with a knob and a flange mounted thereon on opposite sides of the trocar handle, the trocar handle having an annular portion for rotatably receiving the shaft intermediate the knob and the flange, the annular portion of the trocar handle is rotatable, axially moveable and tiltable with respect to the trocar shaft longitudinal axis.

2. The device as set forth in claim 1 wherein the trocar has an annular recess in which an annular engagement section of the second handle engages, so that the annular engagement section cants into said annular recess and clampingly engages the trocar when the handles are clamped against each other.

3. The device as set forth in claim 2 wherein a section of the trocar is configured as a rotary knob at the end facing away from the tissue protection sleeve.

4. The device as set forth in claim 1 wherein a shaft of the trocar has a plurality of radial flanges arranged at axial intervals, external diameters of said flanges are somewhat smaller than the internal diameter of the tissue protection sleeve and a part of the axially parallel bore holes continues along sections of the shaft as axially parallel grooves between the flanges, which shaft sections are formed having smaller diameters then said flanges.

5. The device as set forth in claim 1 wherein the trocar handle is comprised of elastically deflectable material.

6. The device as set forth in claim 1 wherein the trocar handle is arranged above the sleeve handle.

7. The device as set forth in claim 6 wherein the trocar handle has a longitudinal slot in a section facing towards the sleeve handle such that a section of the sleeve handle engages in the longitudinal slot.

8. The device as set forth in claim 1 wherein at least two of the bore holes surrounding the central bore are at different radii with respect to a central longitudinal axis of said trocar.

9. A device for the installation of a guide wire for a drilling tool in a correct positional arrangement in a bone comprising:

a tubular sleeve having a handle at a first end and an internal bore extending along an axis; and

a trocar having a bore hole for receiving the guide wire, said trocar sized for insertion into the internal bore of said tubular sleeve and for rotation therein, said trocar having a handle unconnected to the sleeve handle, said handles extending generally in parallel immediately prior to their engagement at a first end and at least one bore therethrough, said trocar handle having a shaft including a recess for engaging a shaft of said sleeve handle upon rotation of said trocar handle about the axis of the sleeve bore into general parallel alignment with said sleeve handle the trocar having a shaft extending along the longitudinal axis with a knob and a flange mounted thereon on opposite sides of the trocar handle, the trocar handle having an annular portion for rotatably receiving the trocar shaft intermediate the knob and the flange, the annular portion of the trocar handle is rotatable, axially moveable and tiltable with respect to a longitudinal axis of the trocar shaft.

10. The device as set forth in claim 9 wherein said trocar handle is deflectable for moving said slot into engagement with said cylindrical portion of said sleeve handle.

11. The device as set forth in claim 10 wherein said trocar handle at said first trocar end is spaced along a longitudinal axis of said trocar and said sleeve after assembly, beyond said sleeve handle at said first sleeve end.

12. The device as set forth in claim 11 wherein said trocar handle is made of an elastically deformable material.

13. The device as set forth in claim 12 wherein the trocar handle is made of plastic.

14. The device as set forth in claim 9 wherein said trocar has a central bore and a plurality of parallel bores around said central bore, at least two of said plurality of bores are at a different radii with respect to a central longitudinal axis of said central bore.

15. The device as set forth in claim 14 wherein a shaft of the trocar has a plurality of radial flanges arranged at axial intervals, external diameters of said flanges are somewhat smaller than the internal diameter of the tissue protection sleeve and a part of the parallel bore holes continues along sections of the shaft as axially parallel grooves between the flanges, which shaft sections are formed having smaller diameters than said flanges.

16. A device for the installation of a guide wire for a drilling tool in a correct positional arrangement in a bone comprising:

a trocar having a shaft with a plurality of bores therethrough and a handle portion at a first end thereof; and

a sleeve having a bore extending along an axis for rotatably receiving said trocar shaft, said sleeve having a handle portion mounted at a first end thereof unconnected to the trocar handle, said trocar handle rotatable about the sleeve bore axis and having a recess for receiving a part of said sleeve handle portion when said trocar shaft is received within said bore of said sleeve wherein said sleeve handle has a cylindrical shaft portion and said trocar handle shaft is bent and said recess in said trocar handle is a slot with said slot moveable into engagement with said cylindrical shaft portion, the sleeve and trocar handles extending generally in parallel immediately prior to the engagement of the slot and shaft the trocar having a shaft extending along the longitudinal axis with a knob and a flange mounted thereon on opposite sides of the trocar handle, the trocar handle having an annular portion for rotatably receiving the trocar shaft intermediate the knob and the flange, the annular portion of the trocar handle is rotatable, axially moveable and tiltable with respect to a longitudinal axis of the trocar shaft.

17. A device for the installation of a guide wire for a drilling tool in a correct positional arrangement in a bone comprising:

a tubular sleeve having a longitudinal axis and a handle extending transversely to the longitudinal sleeve axis at a first end and an internal bore; and

a trocar having a longitudinal axis and a bore hole for receiving the guide wire, said trocar sized for insertion into the internal bore of said tubular sleeve and for rotation therein, said trocar having a handle unconnected to the sleeve handle extending transverse to said trocar longitudinal axis at a first end and at least one bore therethrough, said trocar handle having a shaft including a recess for engaging a deflectable shaft of said sleeve handle upon rotation of said trocar handle with respect to the sleeve longitudinal axis into alignment with said sleeve handle the trocar having a shaft extending along the longitudinal axis with a knob and a flange mounted thereon on opposite sides of the trocar handle, the trocar handle having an annular portion for rotatably receiving the trocar shaft intermediate the knob and the flange, the annular portion of the trocar handle is rotatable, axially moveable and tiltable with respect to the trocar shaft longitudinal axis.

18. The device as set forth in claim 17 wherein said deflectable sleeve handle has a cylindrical shaft portion and said trocar handle shaft is bent and said recess in said trocar handle is a slot with said slot moveable into engagement with said cylindrical shaft portion.